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(N0 Mode l.)

, T. O. HA'RGRAVE.

WASTE PIPE TRAP.

No. 802,728. Patented July 29, 1884.

FIGS

\A/lTwEssE INVENTOR MMQA'LUHMfiA/Wb UNITED STATES PATENT OFFICEQ THOMASC. HARGRAVE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE HALF TO THOMASW. WILSON, OF SAME PLACE.

WASTE-PIPE TRAP.

LM'lLCEZ-TCATION forming part of Letters Patent No. 302,728, dated July29, 1884.

(No model.)

To (LZZ whom it may concern:

Be it known that I, THOMAS C. HARGRAVE,

a citizen of the United States, residing at Minneapolis, in the countyof Hennepin and State of Minnesota, have invented a new and usefulImprovement in WVastc-Pipe Traps, of which the following is aspecification.

My invention relates to improvements in waste-pipe traps of the siphonform used in connection with the discharge-pipes of washbowls and thelike; and the object of my invention is to furnish a means of emptyingthe trap or siphon of its contents to prevent freezing, and also to soclose the pipe that sewer- 1 5 gas may not pass through when thusemptied.

I attain these objects by the arrangement of devices illustrated in theaccompanying drawings, in which- Figure 1 is a vertical section of theentire trap; Fig. 2, a perspective view, and Fig. 3 an elevation.

Ais a curved inlet connected with the wastepipe leading from the bowl;B, a three-way cock,which, when in the position shown in the drawings,connects the inlet A with the curved passage O O O, thereby forming asiphon having its water-line at E E. D is a channel con necting the cockB with the siphon-pipe, and G the opening in the plug of the cock formaking the connection between the channel D and passage 0 O O. The pipesfor these passages maybe round; butI prefer having them some- I whatflattened horizontally, and the opening in the plug of the cockcorrespondingly elliptical.

In operating the device,when the cock B isin the position shown in thedrawings, the liquid enters through the inlet A, passes through the cockand passage 0 G O to the drain or sewer.

To empty the siphon, turn the handle F of the cock half-way round. Thisbrings the opening G of the cock in connection with the channel D,through which the siphon is emptied. To close the .inlet A, move thehandle back from the last position one-quarter turn. This brings thesolid part of the plug of the cock B over the inlet, and effectuallycloses it. To again make ready for use, move the handle to the uprightposition shown. Should an obstruction lodge in the siphon, by unscrewingthe cook, a bent Wire can be inserted and the obstruction removed.

Having fully described my invention, what I desire to claim and secureby Letters Patent 1s- The combination, with a siphon-trap, of athree-way cock in the lower curve ofthe siphon, and a channel connectingsaid cock with the discharging-leg ot' the siphon at a lower point.

THOMAS O. HARGRAVE.

Witnesses:

R0131. C. KUL'KLUFF, Howe PAIGE.

